FUTABA 12K Instruction Manual page 90

This function limits the swash travel to a fixed
range in order to prevent damaging the swash
linkage by simultaneous operation of the ailerons
and elevators. It is very useful in 3D aerobatics
which use a large travel.
RTN
HOME/EXIT
RETURN
Swash ring setting procedure
*The display blinks.
*Adjust the rate to maximum swash tilt.
*When the RTN button is pushed for one second, the rate is
reset to the initial value.
<Functions of Linkage Menu>
90
<Push Dial>